The holiday window displays at big-city department stores draw huge crowds at this time of the year. Andria Cheng visits Saks for a look at this season's decorations and what it takes to design them.

This transcript has been automatically generated and may not be 100% accurate.

... I ... the UI retailer's joint picture is about to ... get on a window at the time right yet ... no one can think you're making that pressure holiday we know ... I've talked to back to find out ... so we shut the window for us is actually in December while the previous years when desert and ... we walked by this you know what they're doing is talking to Wall Street to see what they like and what they're responding to Suby do more of that next year ... any differ way in and thinks that maybe we thought were does well and are working as well ... we can take those out for next year so ... initially the start that early and in early January February ... will start our concept or sketching for next year ... working through to storyboards in the middle straight into the summer Rex prototyping ... and start building some proponents of the windows ultimately by fall we built all six windows offsite completely ... and then we break it down with diminutive and as of the bill that you ... know it's exciting for us this year the first few reasons one is because it reduced the level of interactivity that we haven't had the past so ... we have a kaleidoscope wouldn't that answer these traditional kaleidoscope since you might recognize or know from ... your childhood ... but now we've had this to Joe Allen and maybe Cameron them into the next ... turns viewers as they walk by Into Digital snowflakes in the window ... given what are the other exciting with the lead on this year's be found a couple of artists from Australia on YouTube ... and actually use them to do a video for stop motion talk video ... that's in our last window ... of it is a labor of love by all means you're working with some of its little in the other side of the world ... was a blast and we're really pleased how it turned out to what I'm not talented enough to calm I think that the kid that ... I have to say probably the hardest one that we did so for there to ending the first winter the snow globe window ... their shells during their suddenly turn in on themselves within about thirty seconds of an inch of each other so they're very very close turning ... in to keep them turning in balances of an engineering ... miracle honestly ... most tablets that were never maybe a hundred times ... in their whole lifetime if you will ... be so close are turning thousands of times for six weeks twenty firms in a piece that looks turning ... to me actually cut one up ... to a motor in the shop ... and had a turn constantly for two weeks to see what happened in the window where you make it snow was certain the town's how we make it snow it's to fifty five degrees outside and it's not cold in the windows of easing the impact that ... the boys to this record for snow in the minutes that was ... certainly no small feat there's a will see that it's it's that there's an we'd been through several iterations of ... what we can do to make it look like snow in what was the most like so ... and after tests and trials over the summer we tried out the week for five different ... components that fall like snow ... we landed on Featherston literally will reopen the window we take a down pillow part of the feathers and that their noses and ... now we have snow in them and it's you know the behind the scenes because of all these motors this wires and cables and ... computers that are putting everything in it and it's also the ... hidden away and that's how it all works but we don't really ... want the people outside even know or be concerned with how it works it is part of what we do but these ... miles and miles of wire and tape and paint them ... and glued all of that expected that's that's for the fun that we had so that you don't see them ...